OBD plug on my '88 dodge

Discussion in 'Tech Info' started by kdegans, Jun 19, 2015.

  1. kdegans

    kdegans Junior Member

    Age:
    26
    Posts:
    3
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    Joined:
    Jun 19, 2015
    Ram Year:
    1988
    Engine:
    V6 3.9L
    hey everyone, was wondering if any one knows where the OBD plug is on the older trucks?
     

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  2. jayhuc

    jayhuc Member

    Posts:
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    Joined:
    Oct 5, 2013
    Location:
    Toronto
    Ram Year:
    2011
    Engine:
    hemi 5.7
    OBD didnt start till like 94 95 ish...
    It shouldn't have one.
     
  3. crazzywolfie

    crazzywolfie Senior Member

    Posts:
    14,096
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    Joined:
    Apr 6, 2013
    Location:
    under the truck
    Ram Year:
    81 93
    Engine:
    5.2
    the OBD1 plug is under the hood on the drivers side fender towards the corner. it is completely different than an obd 2 and would require a special code reader to pull the code. now you can do the key dance which will do the same thing and allow you to pull the codes.
    ON-BOARD DIAGNOSTICS Dodge OBD1 Pre 96

    1. Cycle the ignition key ON-OFF-ON-OFF-ON within 5 seconds. To cycle the ignition key ON means to turn it only as far as it takes to get the radio to come on. It does not mean to turn the engine on.

    2. Count the number of times the "check engine" lamp on the instrument panel flashes on and off. The number of flashes represents the code. There is a slight pause between the flashes representing the first and second digits of the code. Longer pauses separate individual codes. For example, flash-flash-flash [pause] flash-flash represents the code 32.

    A code of "55" represents end of error codes. If this is all you get then no error codes are stored in the computer. This is the normal condition

    CODE Description of Trouble Code
    11 Timing belt skipped 1 tooth or more from initial learned value, Intermittent loss of either camshaft or crankshaft position sensor, No crank reference signal detected during engine cranking
    12 Direct battery input to PCM was disconnected within the last 50 key-on cycles (normal)
    13 No change in MAP from start to run
    14 MAP sensor voltage too low
    15 No vehicle speed sensor signal
    17 Closed loop temp not reached or engine cold too long
    21 02s sensor problem (oxygen sensor), upstream or down stream
    22 Engine coolant temp sensor out of range
    23 Intake air temp sensor out of range
    24 Throttle Position sensor out of range
    25 Idle air control motor circuits, target idle not reached (+/- 200),vacuum leak found
    27 Injector control circuit
    31 Evap purge flow monitor failure or evap solenoid circuit
    32 EGR system failure
    33 A/C clutch relay circuit
    34 Speed control Solenoid circuits
    35 Rad Fan control relay circuit
    37 Torque converter clutch solenoid CKT or park/neutral switch failure
    41 Generator field not switching properly
    42 Fuel pump relay control ckt, Auto shutdown relay control ckt, No ASD relay output voltage at PCM, Fuel level sending unit volts out of range, Fuel level unit No change over miles
    43 Multiple/ single cylinder misfire
    44 Battery temp sensor volts out of range
    45 Overdrive solenoid shorted or open (automatic transmission only)
    46 Charging system voltage too high
    47 Charging system voltage too low
    51 Fuel system lean
    52 Fuel system rich
    53 Internal control failure
    54 No Cam signal at PCM
    55 End of error messages (If you get this only, no errors were found)
    62 PCM failure SRI mile not stored
    63 PCM Failure EEPROM write denied
    64 Catalytic Converter Efficiency Failure
    65 Power steering switch failure
     
    WinterLion and sbarron like this.
  4. WinterLion

    WinterLion Junior Member

    Age:
    34
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    Joined:
    Jan 12, 2018
    Location:
    Phaelon
    Ram Year:
    1989
    Engine:
    3.0
    I have an 89 Dodge Ram and I only signed up to say thank you for posting this information! This will be my weekend project now!

    Sent from my LG-H932 using Tapatalk
     

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